EP0423343A4 - Abnormal pressure prevention-vacuum prevention valve - Google Patents

Abnormal pressure prevention-vacuum prevention valve

Info

Publication number
EP0423343A4
EP0423343A4 EP19890913244 EP89913244A EP0423343A4 EP 0423343 A4 EP0423343 A4 EP 0423343A4 EP 19890913244 EP19890913244 EP 19890913244 EP 89913244 A EP89913244 A EP 89913244A EP 0423343 A4 EP0423343 A4 EP 0423343A4
Authority
EP
European Patent Office
Prior art keywords
prevention
vacuum
abnormal pressure
valve
prevention valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19890913244
Other versions
EP0423343A1 (en
Inventor
M. Kawasaki Factory Of K.K. Komatsu Akashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Publication of EP0423343A1 publication Critical patent/EP0423343A1/en
Publication of EP0423343A4 publication Critical patent/EP0423343A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
    • F16K17/19—Equalising valves predominantly for tanks
    • F16K17/196—Equalising valves predominantly for tanks spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7771—Bi-directional flow valves
    • Y10T137/7772—One head and seat carried by head of another
    • Y10T137/7774—Supporting valve spring carried by supporting valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7771—Bi-directional flow valves
    • Y10T137/7772—One head and seat carried by head of another
    • Y10T137/7777—Both valves spring biased
EP19890913244 1988-11-30 1989-11-30 Abnormal pressure prevention-vacuum prevention valve Withdrawn EP0423343A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1988154989U JPH0645109Y2 (en) 1988-11-30 1988-11-30 Abnormal pressure prevention and vacuum prevention valve
JP1549/89U 1988-11-30

Publications (2)

Publication Number Publication Date
EP0423343A1 EP0423343A1 (en) 1991-04-24
EP0423343A4 true EP0423343A4 (en) 1991-07-24

Family

ID=15596285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890913244 Withdrawn EP0423343A4 (en) 1988-11-30 1989-11-30 Abnormal pressure prevention-vacuum prevention valve

Country Status (5)

Country Link
US (1) US5074330A (en)
EP (1) EP0423343A4 (en)
JP (1) JPH0645109Y2 (en)
KR (1) KR900702283A (en)
WO (1) WO1990006463A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7158038B2 (en) * 2017-09-21 2022-10-21 株式会社コスメック Cylinder device with sequence valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134402A (en) * 1962-04-30 1964-05-26 Hydraulic Unit Specialities Co Hydraulic control valve having void control means
US3194265A (en) * 1962-05-02 1965-07-13 Hydraulic Unit Specialities Co Hydraulic control valve with void control means
GB1045030A (en) * 1964-09-30 1966-10-05 Dowty Hydraulic Units Ltd Fluid valves

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112763A (en) * 1962-04-12 1963-12-03 Hydraulic Unit Specialities Co Combined high pressure relief and void control valve
JPS5169917U (en) * 1974-11-29 1976-06-02
JPS56156570A (en) * 1980-05-06 1981-12-03 Aisin Seiki Co Ltd Check valve combined with balance piston type relief valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134402A (en) * 1962-04-30 1964-05-26 Hydraulic Unit Specialities Co Hydraulic control valve having void control means
US3194265A (en) * 1962-05-02 1965-07-13 Hydraulic Unit Specialities Co Hydraulic control valve with void control means
GB1045030A (en) * 1964-09-30 1966-10-05 Dowty Hydraulic Units Ltd Fluid valves

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9006463A1 *

Also Published As

Publication number Publication date
EP0423343A1 (en) 1991-04-24
JPH0645109Y2 (en) 1994-11-16
JPH0276275U (en) 1990-06-12
US5074330A (en) 1991-12-24
WO1990006463A1 (en) 1990-06-14
KR900702283A (en) 1990-12-06

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19901211

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A4 Supplementary search report drawn up and despatched

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AK Designated contracting states

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17Q First examination report despatched

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RBV Designated contracting states (corrected)

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STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19950601